The Postal Service oversees 33,620 properties, totaling 288.6 million square feet. Approval for facility projects over $25 million rests with the Board of Governors. Design and construction of major processing plants are managed at headquarters. Approval for projects under $25 million is established by the postmaster general following review by the Capital Investment Committee. Most of the planning, leasing, purchasing, designing, and construction work associated with facilities is performed by field offices.